Who Would You Like to Punish?

I’m reading Ken Follett’s Fall of Giants, and the story's account of the onset of World War I reminded me of my college days. In history classes I recall being frustrated by the stupidity, cruelty, and arrogance of people who did as they wanted no matter what the consequences were.
Case in point: World War I and the national leaders of Germany, Austria, Russia, and England. The causes of the war are complicated, but there were many times when war could have been avoided if heads of state hadn't based their decisions on selfish interests and pompous national pride.
The WWI example was personal to me, because my grandfather was one of many men sent to fight that useless war. Badly wounded when a bullet shattered his jaw, he woke up after the battle was over to find that his comrades had moved on. Delirious with pain, he wandered for several days on the plains of France. His wife was told he was missing and presumed dead. He was eventually found by the Red Cross and saved, but he suffered a great deal of physical pain and was disfigured for life.

(Yes, that’s a great idea for a novel but no, I’m not going to write it.)

What I’m getting at is a question for you: In one sentence, what historical character(s) would you like to be able to bring to justice?